1. Milk sugar: Milk can react with fructose when heated to produce toxic fructose amino acids, which are harmful to the human body.

2. Milk and leeks: Milk contains calcium; calcium is the main component of bones and teeth; mixing milk with leeks, which contains a lot of oxalic acid, will affect the absorption of calcium.

3. Milk and spinach: Eating them together can cause dysentery.

4. Milk and Enoki mushrooms: indigestion.

5. Milk and kiwi fruit: affect digestion and absorption, resulting in abdominal distension, abdominal pain, and diarrhea

6. Milk and rice soup: cause a large loss of vitamin A.

7. Milk calcium powder: The protein in milk combines with calcium to precipitate, making it difficult to absorb.

8. Milk and brown sugar: greatly reduces the nutritional value of milk.

9. Milk and chocolate: If these two are eaten together, they will easily form insoluble calcium oxalate, which not only affects absorption, but also causes dry hair, diarrhea, calcium deficiency, and slow growth and development.